<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <style>
        table{
            font-size: 16px;
            border-collapse: collapse;
        }
        .one{
            text-decoration: line-through;
            color: red;
        }
        .two{
            color:green;
            text-decoration: line-through;
        }
        .three{
            color: blue;
            font-weight: 700;
        }
    </style>
    <table border="1">
        <tr class="one">
            <th>1</th>
            <th>2</th>
            <th>3</th>
        </tr>
        <tr class="two">
            <th>4</th>
            <th>5</th>
            <th>6</th>
        </tr>
        <tr class="three">
            <th>7</th>
            <th>8</th>
            <th>9</th>
        </tr>
    </table>
</body>
</html>